47 CFR § 1.10008
What are IBFS file numbers?
February 16, 2021
(a) We assign file numbers to electronic applications in order to facilitate processing.
(b) We only assign file numbers for administrative convenience; they do not mean that an application is acceptable for filing.
(c) For a description of file number information, see The International Bureau Filing System File Number Format Public Notice, DA-04-568 (released February 27, 2004).
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